关键词: 滚动轴承转子定子, 碰摩故障, 非线性, 分岔, 混沌

Abstract: Based on the test apparatus of some aeroengine, nonlinear dynamic properties, especially the bifurcation and chaos behaviors, of rolling bearing-rotor-stator box with local rubbing were studied by means of numerical simulation. Different from other models, the rotor of some aeronautic engine test apparatus was supported on stator box by the rolling bearing. It was simplified as a model with three masses and six degree of freedom for studying the rubbing response of rolling bearing-rotor-stator box. In view of the case of multi-parameters, the bifurcation behaviors and chaos motion of rolling bearing-rotor-stator box were analyzed in detail. The effect of parameters such as masses ratio, impact-rub stiffness ratio, eccentric mass and bearing clearance etc, on the nonlinear dynamic properties was discussed. Abundant dynamic behaviors of rotor were revealed by the diagrams such as Poincare mapping, bifurcation diagram, phase plane plots, locus trajectory and amplitude spectrum. The stiffness ratio of impact-rub stiffness and rotor bending stiffness have distinct effect on the chaos motion properties of rotor-stator box. The responses of rolling bear-rotor-stator system are mainly periodic effect on the chaos motion properties of rotor-stator box. The responses of rolling bearing-rotor-stator system are mainly periodic motions and pseudo-period motions when stiffness ratio of impact-rub stiffness and rotor bending stiffness ratio are in some range. The response shows obvious chaos motion when the stiffness ratio is in brand range. The area of chaos gradually increase with increase of the stiffness ratio.